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Fitness For Life Test #2
Ch. 4-6
35
Fitness
Undergraduate 1
03/05/2011

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Cards

Term
muscle fiber
Definition
single muscle cell, usually classified according to strength, speed, and energy
Term
myofibrils
Definition
protien structures that make up muscle fiber
Term
hypertrophy
Definition
increase size in muscle fibers usually stimulated by musclular overload, strength training
Term
atrophy
Definition
increase in size of muscle fibers
Term
hyperplasia
Definition
increase in the number of muscle fibers
Term
slow-twitch fibers
Definition
red muscle fibers that are fatigue resistant but have a slow contraction speed and a lower capacity for tension; endurance
Term
fast-twitch fibers
Definition
white muscle fibers that contract rapidly and forcefully but fatigue quickly, strength and power
Term
motor unit
Definition
motor nerve(initates movement) connected to one or more muscle fibers
Term
muscle learning
Definition
the improvement in the body's ability to recuit motor units, strength training
Term
tendons
Definition
tough band of fibrous muscle tissue that connects a muscle to a bone or other body part and the force exerted by the muscle
Term
ligament
Definition
tough band of tissue that connects the ends of bones to other bones or supports organs
Term
repetition maximum
Definition
max amount of the resistance that can be moved a specific number of times
Term
repetitions
Definition
number of times an exercise is performed during one set
Term
static (isometric) exercise
Definition
exercise involving a muscle contraction without change in length
Term
dynamic (isotonic) exercise
Definition
involving a contraction with a change in muscle's length
Term
concentric
Definition
muscle gets shorter
Term
eccentric
Definition
muscle gets longer
Term
sets
Definition
group of repetitions followed by a rest period
Term
agonist muscle group
Definition
when a muscle contracts
Term
antagonist muscle group
Definition
when the opposing muscle must relax stretch to allow contraction by the agonist
Term
Flexibility
Definition
highly adaptable and is increased through stretching exercises
Term
static flexibility
Definition
the ability to assume and maintain an extended posistion at one end or point in a joint's range of motion
Term
dynamic flexibility
Definition
the ability to move a joint through its range of motion with little resistance
Term
static stretching
Definition
technique in which a muscle is slowly and gently streched and then held
Term
ballistic stretching
Definition
muscles are stretched by the force generated as a body part is repeatedly bounced, swung, and jerked
Term
dynamic functional stretching
Definition
muscles are stretched by moving joints slowly and fluidly through their range of motion in a controlled way
Term
passive stretching
Definition
muscles are stretched by force applied by an outside force
Term
active stretching
Definition
technique in which muscles are stretched by the contraction of opposing muscles
Term
function of the spine
Definition
provides structural support for the body, protects the spinal cord, supports much of the body's weight, serves as an attachement site, allows movement for the neck and back
Term
Body Composition
Definition
the body's relative amount of fat and fat-free tissue
Term
Overweight
Definition
above the recommended range for good health
Term
obesity
Definition
severly overweight, excessive accumulation of body fat may also be defined in terms of some measure of total weight
Term
metabolic syndrome
Definition
cluster of symptoms presently in many overweight and obese people that greatly increase their risk of diabetes, heart disease, and chronic illnesses
Term
diabetes mellitus
Definition

causes a disruption of normal metabolism,

pancreas no longer secrets insulin.

6th leading cause of death in the US

Term
body mass index
Definition
measure of relative body weight correlation highly with more direct measures of body fat
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